Hey Billy North,
much truth in the statement that where you live will have what you need. Really tough here to find cotton bibs and straw hats.
Layers. Layers. Layers.
In my wet cold it is thin wools 50F, wet and below. Merino is the new wonder next to skin fabric. Hot wood stoveing and polyester Under Armor is a no-no. Same with all of the poly/nylon outer wear. No one Cascades westside wet here wears down insulated!
My go-too is the area Pendleton Woolen Mills outlet store. HERE, this stuff does show up in thrift stores.
Three days this winter I had 20’s F cold and dry and used the Sorel canvas outer ware. Wet cold rains/transitions in-and-out this stuff will soak up and weigh a ton - take forever to dry.
45-50F wet and transitions and I use lighter canvas’s and/or corduroy shirts and pants. With a Healy-Hanson flexible durable light weight outer layer. Bibs and jacket. These lighter open woven/knap cottons soak up and hold much less wet than heavy denims. Body work heat dry much faster. Insulated vest up the core to force warm blood out to the extremities. I own and use a lot of different weights/materials of vests.
As said if you are somewhat cold before you work it is just about right. Work to warm. Never slow down until back into space heating.
Gloves? I use rubber dotted knit wool finger types - always. Wring out when wetted. Rough working - overlayer with thin pigskin leather outers.
As said - findable, here.
tree-farmer for fuels Steve Unruh